Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Thermal Gradient Change of T-shaped Mg Alloy Specimen Exposed to Electropulses

전류펄스 인가된 T자형 Mg 합금 시편의 온도 구배 변화

  • J.H. Song ;
  • D.J. Park ;
  • S. Cheon ;
  • J. Yu ;
  • S.H. Lee ;
  • T. Lee (School of Mechanical Engineering, Pusan National University)
  • 송종한 (부산대학교 기계공학부) ;
  • 박동준 (부산대학교 기계공학부) ;
  • 천세호 (부산대학교 기계공학부) ;
  • 유진영 (부산대학교 기계공학부) ;
  • 이성호 (부산대학교 기계공학부) ;
  • 이태경 (부산대학교 기계공학부)
  • Received : 2024.06.26
  • Accepted : 2024.07.09
  • Published : 2024.08.01
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Abstract

Electropulsing treatment (EPT) has been developed as an alternative to furnace heat treatment (FHT) to exploit its engineering advantages in rapidly annealing metallic materials. Conventionally, the separation of thermal and athermal effects of EPT has been attempted by comparing EPT and FHT specimens processed under identical temperature and duration. However, this method inherently introduces experimental and measurement errors. This study proposes a novel approach to distinguish the thermal and athermal effects of EPT-processed metals using T-shaped specimen with two observation points, namely 'C' and 'D'. For verification, the thermal gradient of T-shaped Mg alloys was examined under various EPT conditions. The points C exhibited higher temperatures compared to those at points D at a given electric current density, because only the former received both thermal and athermal effects. It was confirmed from twelve specimens that the point C at an electric current density of 65 A·mm-2 and point D at 70 A·mm-2 exhibited similar temperatures. This developed method is expected to reduce measurement errors in distinguishing thermal and athermal effects, thus providing a deeper understanding of their quantitative contributions in future studies.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음

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